Every once in a while, it's a good idea to spend about 20 minutes looking around the shop pretending that you are an OSHA safety compliance officer. For effect, make up a stack of "red cards" and place them on equipment, power tools, saws without guards, trip hazards, improper eye protection gear, dirty dust masks, improperly stored flammables and banana peels.
If nothing else, just make sure you know where the nearest fire extinguisher is.
Also. extension cords can be dangerous.......this one has experience a total melt down. Unfortunately, it was still operational and it gave no indication of it's impending doom.